What is the structure through which water enters the water vascular system of a sea star?
a. ampulla
b. radial canal
c. madreporite
d. ring canal
Answer: c. madreporite
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Birds that dive into the water from a height of 18 to 30 meters are called:
a. pelicans. b. albatross. c. tubenoses. d. boobies. e. puffins.
Indicate the order of the point mutations in the rII region.
Shown below are the maps of a series of rII- deletion strains (1–5). The deleted region is indicated as (......) and the intact region as ______.
1 ___________(...........)_______________
2 _________________(...........)_________
3 (.....................)_____________________
4 ________________________(................)
5 _____(..........)______________________
rII- phage strains A-E have point mutations in the rII region. E.coli K(?) cells are coinfected with one phage that has a deletion and one phage that has a point mutation. The presence of wild-type progeny phage is assessed by the presence (+) or absence (o) of plaques.
A) CADBE
B) DEBAC
C) BADCE
D) ABDEC
E) CEADB
If a predator is nearby, Thompson's gazelles will try to deter it by jumping and displaying its abilities through a behavior called
A. mobbing. B. bobbing. C. dribbling. D. stotting. E. cavorting.
What three features define eusociality? (Check three.)
A. insect species only B. overlap of generations C. haplodiploidy D. cooperative brood care E. reproduction during a mating flight F. reproductive division of labor G. colony resides in an enclosed hive or nest